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Manuel Fombuena
96fa4d6995
Fix the repeat section: -1 is a valid value meaning infinite repeat,
as accepted by the ledtrig-pattern sysfs interface; only 0 and values
below -1 are rejected. The previous text incorrectly stated all negative
numbers were invalid. Also remove the redundant trailing sentence since
the behaviour is now covered inline.
Add the brightness range (0-255) to the hw_pattern section, which was
previously undocumented.
Fixes: b1816b2238 ("Documentation:leds: Add leds-st1202.rst")
Signed-off-by: Manuel Fombuena <fombuena@outlook.com>
Assisted-by: Claude:claude-sonnet-4-6
Link: https://patch.msgid.link/GV1PR08MB8497B2FB4F5AC4B142790CE5C5F52@GV1PR08MB8497.eurprd08.prod.outlook.com
Signed-off-by: Lee Jones <lee@kernel.org>
34 lines
1.1 KiB
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34 lines
1.1 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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============================================
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Kernel driver for STMicroelectronics LED1202
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============================================
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/sys/class/leds/<led>/hw_pattern
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--------------------------------
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Specify a hardware pattern for the ST1202 LED. The LED controller
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implements 12 low-side current generators with independent dimming
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control. Internal volatile memory allows the user to store up to 8
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different patterns. Each pattern is a particular output configuration
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in terms of PWM duty-cycle and duration (ms).
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To be compatible with the hardware pattern format, maximum 8 tuples of
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brightness (PWM) and duration must be written to hw_pattern.
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- Brightness range: 0-255
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- Min pattern duration: 22 ms
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- Max pattern duration: 5610 ms
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The format of the hardware pattern values should be:
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"brightness duration brightness duration ..."
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/sys/class/leds/<led>/repeat
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----------------------------
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Specify a pattern repeat number, which is common for all channels.
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Default is 1. Writing 0 is invalid. Writing -1 or 255 repeats the
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pattern indefinitely.
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This file will always return the originally written repeat number.
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